Illusion Ghost location in Destiny 2 The Final Shape

sorry if im being dumb, new player who finished the final shape campaign a couple days ago, the quest from Micah is telling me its on the Throne World of Savathun but good lord the waypoint is soo iffy, where on earth exactly is this can someone point it out?
 
The Illusion ghost is right where you fought Savathun at the final mission of the witch queen DLC campaign, like after u cross that long bridge to her Island and face her in a boss battle
 
check this guide, I hope this is helpful
 
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